In oil and gas transportation systems, pipeline pigs play a critical role in ensuring pipeline cleanliness, operational safety, and long-term efficiency. As the industry raises the bar on durability, sealing performance, and service life, polyurethane elastomers—thanks to their excellent mechanical properties and customizability—have become the preferred material for high-end pig components such as scraper discs, sealing cups, and buffer heads.
To meet these escalating requirements, Feilong Polyurethane Equipment has introduced its oil-heated polyurethane elastomer casting machine. With superior temperature stability, precision metering and mixing, and industry-grade reliability, it delivers significant advantages for manufacturers of polyurethane components dedicated to pipeline pigging applications.
1. Stringent Material and Process Requirements for Pipeline Pig Polyurethane Components
Pipeline pigs operate in harsh environments, enduring high pressure, continuous friction, corrosive media, and unpredictable pipeline terrain. Therefore, polyurethane components must meet extremely demanding criteria:
- High hardness paired with high elasticity (typically Shore A 70–95)
- Exceptional tear resistance and wear resistance
- High batch-to-batch consistency to ensure reliable pigging performance
- Bubble-free and impurity-free dense structure to prevent premature failures
These requirements place strict demands on polyurethane raw material conditioning, temperature control accuracy, and the overall casting stability throughout the production process.
2. Technical Advantages of Feilong’s Oil-Heated Polyurethane Casting Machine
Feilong’s oil-heated elastomer casting machine is specifically engineered for high-performance polyurethane applications. Its core features align strongly with the needs of pipeline pig manufacturing:
1) Oil-Bath Heating for Uniform and Stable Temperature Control
Compared with direct electric heating, the oil-heated system uses circulating thermal oil, maintaining extremely low temperature fluctuation (within ±1°C). This prevents localized overheating, reduces prepolymer degradation, ensures uniform reaction kinetics, and ultimately enhances the mechanical integrity of finished pig components.
2) High-Precision Metering and Mixing Unit
Equipped with precision gear pumps or servo-driven metering systems, the A/B component ratio is controlled within ±1%. Static or dynamic mixing technology ensures thorough reaction, reduces residual monomers, and enhances aging resistance—critical for pigs operating in corrosive or high-pressure media.
3) Modular Design Compatible with Various Pipeline Pig Molds
The machine supports multi-station casting and can be adapted to a wide range of molds, including disc scrapers, spherical buffers, and custom geometries. This flexibility suits both diversified small-batch production and large-scale continuous manufacturing.
4) Industrial-Grade Durability and Safety Assurance
Constructed from stainless steel and high-strength alloys, the system supports 24/7 continuous operation. Multiple protection functions—over-temperature alarms, pressure monitoring, emergency shutdown—ensure compliance with CE and domestic machinery safety standards.
3. Proven Industry Applications
Feilong’s oil-heated polyurethane casting machine has already been deployed in several leading domestic oilfield equipment manufacturers. It is used for producing polyurethane pig components suitable for crude oil, refined products, and natural gas pipelines. According to user feedback, after adopting the oil-heated system, product qualification rates exceeded 98%, significantly reducing rework rates and production costs.
Conclusion
As the demand for high-quality energy infrastructure continues to grow, the performance of pipeline pigs increasingly depends on the precision and stability of upstream manufacturing equipment. Backed by decades of engineering expertise, Feilong Polyurethane Equipment provides a reliable, efficient, and compliant solution for producing high-grade polyurethane pig components through its advanced oil-heated casting technology.
For manufacturers seeking to enhance both the quality and productivity of polyurethane pipeline pigs, Feilong’s oil-heated casting machine is a proven and highly valuable option for technical evaluation.
